Nut-tapping machine



{No.Model.) 3 Sheets- Sheet 1.

NUT TAPPING MACHINE.

No.,504,9'71. Patented Sept. 12, 1893.

(No Model.) 3 sheets-sheet 2. T. S. DISSTON. NUT TAPPING MACHINE.

Patented Sept. 12, 1893.I

w 25 :1w/o m m e ,m ,www .A .,C ms n H a 2, e ..6 /wf/ a w F f. M M .e EW f, l t@ l .L l A l F A IC I E t .2b. p Il M .L A IW. l 8., tu. 1n/.11me .e w, w, a i s m76 (No Model.) 3 Sheets-Sheet 3. T. S. DISSTON.NUTTAPPING MACHINE.

Patenteasept. 12, 1893.

PATENT OFFICE.

UNITED STATES THOMAS S. DISSTON, OF PHILADELPHIA, PENNSYLVANIA.

NUT-TAPPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 504,971, datedSeptember 12, 1893.

Application Bled November 12, 1892. Serial IIa/51,759. (No model.)

To all whom it may concern:

Be it known that I, THOMAS S. Diss'roN, a citizen of the United States,and a resident of Philadelphia, Pennsylvania, have invented certainImprovements in Nut-Tapping Machines, of which the following is aspecification.

My invention relates to nut tapping machines in which a series of nutsare tapped in succession.

The object of my invention is to construct a machine in which the nutsare carried with the tap, and both tap and nut are discharged after thethread has been cut upon the nut, the tap being again mounted in themachine to cut another nut. By this means I am enabled to rapidly andaccurately cut the th reads in the nuts in an economical manner.

Referring to the drawings:-Figure 1, is a side view of my improved nuttapping machine. Fig. 2, is a vertical sectional view. Fig.3,isasectional plan view on the line 1 2, Fig. 1. Fig. 4, is a plan viewof the machine.

A is the base of the machine, and projecting from this base is a centralstandard B upon which the mechanism is mounted. I would state here thatI utilize the base A as a chamber for lubricants, used for lubricatingthe taps as the taps must be abundantly supplied with oil or otherlubricants at all times, and by providing an oil tank at the base, I amenabled to use the oil over and over again, the drippings from themachine passing into the tank, and from thereit is pumped up and ows' tothe several taps. IThe detail of this mechanism will be described`hereinafter.

Mounted securely on the standard B is a fixed table C, having twoflanges c, c forming a `channel C in which travel the taps a as theypass through the nuts. A portion of the base of the channel is cut awayas shown at c in Fig. 2, to allow for the discharge of the taps and nutsinto their respective receptacles through the chutes c2, c3. The chutec2 `is for the tap, and the chute c3 catches the nuts and carries themaway from the machine. The taps are discharged upon the 'platform Ain-easy reach of the operator who picks up anut blank and a tapandmounts themin position in the machine.

Carried by the table C are the.` bearings b "f orthe driving shaftDwhichrotatesg-thleznut carrier and spindle supporting frame around thecentral axis. The driving shaft D has a worm D which engages with theteeth c of the carrier E. This carrier is mountedon the hub of thespindle supporting frame F which can turn upon the standard B, thestandard being reduced in diameter forming a shoulder upon which theframe F rests. The carrier E and frame F are secured together, and aredriven from the shaft D.

Mounted at suitable distances apart in the frame F, are the wheels G inwhich are the spindles H carrying the several taps a, the taps beingmounted in orifices in the lower portion of the spindle. The severalspindles are splined to the wheels G so that they turn with the wheels;and the wheels in turn gear with the gear wheel I, which is mountedloosely upon the standard B, and has an internal set of teeth c' whichmesh with the pinions i on the vertical shafts I which carry gears 2meshing with pinion i3 mounted on the hub of the bevel wheel i4. Thisbevel wheel is mounted on the upper end of the standard B and mesheswith the bevel pinion 715 on the driving shaft I2 which is adapted tosuitable bearings j on the frame .I which not only carries the drivingshaft bearings, but also the bearings for the vertical shafts I. Thisframe .I is attached tothe standard B. In some instances the two drivingshafts may be used, both being driven by belting or gearing, but Ipreferto drive from one shaft, for instance the driving shaft I2, andcommunicate motion to the shaft D through the medium of the gear wheel kcarried by one of the shafts I', intermediate wheels k', 102, and gearwheel k3 mounted on a vertical shaft K, which has a bevel gear wheelZ atits lower end meshing with the bevel gear wheel Z on the shaft D. Thusthe revolving frame is driven at the same speed as the spindle, and theparts are consequently in time.

Adapted to the carrier E are a series of nut sockets or clamps c', whichreceive the nuts to be tapped. These sockets are interchangeable and arescrewed into the carrier frame so that by simply unscrewing the severalsockets, other sockets may be mounted in the frames to receive nutsdiffering in size.

IOO

several taps travel, this platform supporting the nuts during theirpassage through the machine. When the nuts reach the point Fig. 3, thechannel c4 is enlarged allowing the nuts to fall away from the controlof the carrier and drop into the chute c3. The taps drop into the chutec2 at a point in advance of the point a: shown in Fig. 3. vIn someinstances the taps will feed themselves into and through the nuts, butto insure the proper feeding of the taps, and to make the machine morereliable, I arrange directly above the several spindles H, an inclinedway M which bears upon the heads h of the spindles, and this inclinedway is of such a pitch as to correspond with the pitch of the tap.Consequently as the spindles with their taps are traversed from thefeeding point y to the discharge a: they are gradually forced into thenuts insuring accuracy in the cutting. After the spindles have left thepoint a: they are transferred tothecontrol of a cam N which is shaped aslshown in Fig. l, so as to raise the spindles up their full height, thecam acting upon the enlarged portion h of the heads of the spindles, isothat when the spindles reach the point y they are at their fullheightwith ample room :between the ends of the spindles and the nutcarrier to receive both the tap and the nut tobe tapped. y

I The inclined way M is supported by brackets m mounted on vertical rodsm attached tothe table C, and between the brackets and nuts m2 on therods are springs m3 which tend to press the inclined way M down upon thespindles, and also act as cushions in the event of anaccident happeningto one of the taps. Under each spindle is a spring steadying guide p forthe taps; these guides are forked so as to span the shanks of the tapsand steady them until the spindle passes over the ends 'of the taps andare in position to turn them and tap the nut, the guides yielding to thepressure of the spindles and returning to their raised position whenreleased ready to receive` another tap.

several taps. a pump S driven in any suitable manner; in the presentinstance I have shown a belt wheel mountedon the pump spindle.

' .c'urved pipet which has openings in its inner face so as to allow theoil to pass into the path ofthe taps, thus keeping the taps at all timeslubricated when doing the greaterpor- `ti`on` of the work.

4 The operation of the machine is as fol-v lows; The operator issupplied with a given number of taps, sufficient to keep thema! s is@thesuction pipe extending into the reservoirf W formed in the base A.This suction pipef chine charged tol its full capacity, and the blanksare presented to the machine shaped and having the orifice of the givensize. The operator takes a blank in one hand and a tap in the other andadjusts the tap to the blank, and mounts the tap and blank in themachine at the point y. The tap and blank are then carried around themachine, and at the same time the tap is turned upon its own axis whilethe nut is held and the tap consequently cuts the thread in the nut.When the tap reaches the point z it is released from the nut, havingpassed through it, and drops into the chute c2, and the chute guides itonto the platform A in a position in easy access of the operator soasvto be'again used'to tap another blank. The nut travels until itreaches the point' a: where owing to the enlarged opening, it isvunsupported and consequently falls onto the chute c3, and lis directedto a suitable receptacle. v

It will be understood that in some classes of work it is necessary toream thenutsbefore tapping and by simply inserting reaming tools in themachine it can be used as a reaming machine without departing from myinvention.

I claim as my inventiony l. The combination in a machine for tapping orreaming nuts,of the central standard upon which the mechanism `iscarried, the table tixedlymounted on said standard, the tap carryingframe sleeved upon said standard, the nut carrier sleeved upon and'secured to said tap carrying frame, with mechanism for 'revolving theframe and 'carrier around the standard, and mechanism for revolving eachspindle around its own axis, and with mechanism for feeding the tapsinto the blanks as they are traversed, substantially as described.

2. The combination of the central stand ard,'the table ixed'on saidstandard, a feed shaft mounted on'said table, a worm on said feed shaft,a nut carrier, adapted to revolve around the standard, teeth onsaid'carrier with which the worml engages, the carrier l I will nowdescribe the mechanism by which: the'oil is pumped from the reservoir tothe, Suspended from the table C ishaving sockets adapted to receive the`nut blanks, the spindle 'supporting frame sleeved on the standard, andadapted to travel around said standard, said carrier being sleeved uponand secured to the said frame so as to travel therewith,'wheels G,mounted on said fra-me, spindles 'mounted in said wheels and carryingtaps, `a driving shaft and intervening gearing between the shaft vandthe wheels G by which the several spindles are turned as they'aretraversed around the standard, substantially as described.

3. The combination in a machine for ytapping or reaming nuts, of'acentral standard upon which the mechanism is carried, the table flxedlymounted on said standard the carrier for the nuts, a tap-'carryingframe, and spindles carried by 'said frame and adapted to receive taps,with the mechanismfoi-jre` .'volving the frame'l and carrierjaroundthestandard," the -mechanism for revolving ythe l a t IOO IIO

spindles, and the platform having a slot enlarged at one end, throughwhich the nuts and taps are discharged, substantially as described.

4. The combination of the standard B, the table C, the slotted platformC2, the nut carrier E, sockets therein for receiving the nut blanks tobe tapped, spindle carrying frame mounted on the standard and secured tothe nut carrier, mechanism for revolving the nutcarrier and spindlecarrying frame, the tap spindles, wheels in which the spindles are somounted as to turn with the Wheels and slide therein, and a gear wheelhaving external teeth engaging with the several spindle wheels, andinternal teeth engaging with the driving gear, substantially asdescribed.

5. The combination in a nut tapping machine, of the nut carrier, theplatform thereunder for supporting the nuts, the tap carrying spindles,a carrier therefor traveling with the nut carrier, the mechanism forrevolving the nut and tap carriers around a common axis, and themechanism for revolving the spindles around their own axes, with aninclined plane or cam for depressing the spindles, and cushions abovesaid cam, substantially as described.

6. The combination of the table, the platform slotted to receive thetaps, and adapted to support the nuts, the tap carrying frame and thenut carrier secured thereto and mounted upon the central standard, themechanism for revolving the tap and nut carriers around the standard,the mechanism for revolving the spindles, and the devices for feedingthe taps into the nuts independent of the nuts themsel'ves,with the camfor raising the tap carriers, substantially as described.

7. The combination of the nut carrier and tap carrier, moving in unison,with a yielding guide p mounted under the tap carrier to steady the tapsso that the carrier can pass over and'engage with the taps,substantially as described.

8. The combination in a nut tapping ma.- chine, of the taps and carriertherefor and nut carrier, with an oil discharge pipe situated so as tooil the taps, a feed pump at- .tached to the 'side of said machine, areservoir in the base of the machine and a i'loat carried by the suctionpipe and operating a valve to control the How of oil to the pump,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

THOMAS S. DISSTON.

Witnesses:

HENRY HoWsoN, JOSEPH H. KLEIN.

